Automatic door lock as seen in The Amazing Spiderman 2. Black box is used to house electrical components and the linkage arm will connect the linear actuator to the bolt lock.

Full build can be seen here : http://www.therpf.com/showthread.php?t=245997

Video here: https://www.youtube.com/watch?v=QFS0XpZh1u8

Comment if you have any questions.

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